<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <style>

        div{
            background-color: aqua;
            width: 200px;
            height: 200px;
        }


        /* 块元素  display:block
                display:list-item`       
        */
        /* p 标签放文本可以 不能放块元素 */
    </style>

</head>
<body>
    
    <div></div>

    <ul>
        <li>111</li>
        <li>222</li>
        <li>333</li>
    </ul>



</body>
</html>